%I #4 Oct 17 2015 15:52:43
%S 4,196,26244,1993744,141086884,10808097444,831331827076,
%T 63322713408249,4821670840815504,367536797553489424,
%U 28019444925515784976,2135875239154027938961,162806957002649300388100
%N Number of nX4 arrays of permutations of 0..n*4-1 with each element moved a city block distance of 0 or 2.
%C Column 4 of A263424.
%H R. H. Hardin, <a href="/A263422/b263422.txt">Table of n, a(n) for n = 1..157</a>
%e Some solutions for n=3
%e ..8..9..0..6....0..9.10..1....0..1..7.11....0..3.10.11....8..3..0..6
%e ..1..7..3..2....6..7.11..5....9..5..4..2....4..2..9..7....9..2..1..5
%e .10..4..5.11....8..4..2..3....8..6.10..3....8..1..5..6...10..4..7.11
%Y Cf. A263424.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 17 2015
|